Milking machine



J. VV. y ESKHGLN ET L MILKING MACH-INE Filed Feb. 27, 1922 2 Sheecsnsheet 1 f-Aug. 17,1926. 1,596,520 J. W. ESKHOLME ET Al.

HILKING MACHINE Filed Feb. 27, 1922 2 Sheets-Sheet 2 il y gf H/ f/ ,M 55

Patented Aug. 17, 192.6. l i UNITED STATES PATENT OFFICE.

JOHN W. SKHOLME AND WILLIAM PATTERSONOF CHICAGO, AND PONTUS W.' JOHN- SON, OF ARLINGTON HEIGHTS, ILLINOIS; SAID PATTERSON ASSIGNOR T BURTON- PAGE COMPANY, A GOBPORATION-'OF DELAWARE.

v in txmo MACHINE. Application mea reti-nary 27, 1922.. serial Na 539,630.

This invention relates to a milking maf i Fig. 6 is a sectional view .on line 6-6 of chine of the type comprising an exhaust- AF ig. l, the scalev being enlarged. '5

ing pump adapted togcreate a .vacuum 1n Referring to the drawings, we have shown termittently in a teat"`cup .cluster orequivafif'our invention as embodied in the motor 5 lent device applied @to the cows nddenand a'- driven, two unit milking machine, that is 'chamber adapted', to receive .thefmilkf-'as -tosay, a machine adapted for milking two drawn from the cow and to vdi'scha'rge 'the-cows simultaneously, in which the pump is 50 Y same,- fbetweenfjsuction `i1npu1ses',` into "redriven 'by a motor. It should be stated, cepta'cle'junderjatmospherie' pressur however, that the milk chamber as herein 10 Among'thepbjects ofi-'my inventionare': disclosed might be used in a machine oper- To'providef nnvelfand improved form of ated by hand and in machines having a milk-,receiiin Y gffchamber including an imsingle milk chamber or more than two milk s proved 4valve;(closed by suction and opened chambers. f i

' when thevac1'iuzri .in the chamber disappears 1n the apparatus shown in the drawings, A

or'elie'cting thidis'eharge of the milkfrom represents a supporting framework, B and the chamber; provide improved means C a pair of milk cans (any .suitable recepfor mounting.: ej-milk chamber on a milk tacle might be used), D and E milk receivin 7o can or otherI-recepftacle adapted to receive chambers mounted yupon the cans it when discharged from the chamber; to and C, respectively, F a double acting reprovide novel means for preventing the milk ciprocating pump, Gr a motor (electric motor from being drawn into the pump from the being indicated) for driving the piimp, and milk chamber; and, generally speaking, to H aspeed reducing transmission gear set 75 provide a milking machine which will be interposed between the motor and pump. simple to operate, which canbe readily taken J and K designate air pipes or tubes leadapart for cleaningpurposes'so that the maing from opposite ends of the pump F to chine is sanitary, and which may be nianuthe milk receiving chambers D and E, reactnredat a relatively low cost. spectively, and L and M milk pipes or" tubes so The invention consists in the new and imleading :from the teat cup clusters, or other proved devices, arrangements and construcudder attachments (not Shown) to said milk tions, to, be hereinafter described and chambers D and E, respectively.

. claimed, for carrying out the -above stated ln describing the apparatus reference will objects and such other incidental objects as be made particularly to the milking unit a5 will be referred to-in the following descripcomprising chamber D milk can B, pipes tion of the preferred embodimentof the in- L and J, together with the pump and its vention shown in the annexed drawings. operating mechanisms, and no detailed de- In the drawings, scription given of the unit on the other side Fig. l is a side elevation of a motor driven of the machine consisting of the milk can C, se milking machine, constructed, in accordance milk chamber E and pipes K and M, since with my invention, so that two cows may the units are of identica construction.`

40 be milked by the machine simultaneously. The milk can B is shown as formed with Fig. 2 is a fragmentary, vertical, sectional 'theusual liared mouth or rimilO. On this view o one ofthe milk receiving chambers rim is arranged a cover '11 having a coni- 95 and associated' parts. Y cal portion 12 and-a down turned' iiange 13,

Fig. 3 is a view, in erspective, of a cage the cover being formedwith a plurality of for supporting the oat vvalve associated offsetsl 14 whichraise the body ofthe cover with the airoutlet of the chamber.- abovethe upper edge of the milk can vso as Fig. ais a view,in perspective, lofthe to provide a ventilating opening 15. By ica valve orfclosure device associated with andv this arrangement dirt and dust are pre orming partv of themilk receiving'chamvented from entering the milk can, during '50 ber, j f t l I the milking operation, and at thefsame time Fig. l5v is a' view, in elevation, with parts the heat in the milk is dissipated so as to in section, of the pump and mechanism iorv minimize the propagation of bacteria.

l driving the same, and Cover'12 is formed twith. an upstanding v cylindrical rtion 16 in lwhich lis seated a cylinder 1 preferably made of glass and formed with a seat' for the closure member 19, said seat being here shown as a unitary circumferential groove 18. In this groove is seated the upper edge of the funnel-shaped valve or closure member 19 which is made of rubber or other suitable flexible material. The lower portion of this member is preferably iiat as indicated at 20 'in Figs. 2 and 4. The lower portion of said member is preferably thinner, and consequently more resilient than the upper portion. This fun-- nel-shaped member, with its flattened, tubular spout 20, provides a port for discharge of milk from the milk chamber, which port, however is closed as soon as a vacuum is created in the chamber. The creation of a vacuum in the chamber causes the collapse upwardly of member 19, preventing the entrance of air into the chamber through" the discharge rt. At the same time the deformation o member 19 under a vacuum` expands the rim portion of the member, forcing it closel into the circumferential groove 18.in which vit is seated. This construction, therefore, provides an effective valve which is so engaged with the chamber that it may be ve `easily Aremoved for cleaning and replace in the chamber. .In

. order ,that the cylinder 17 should here? versible it is preferably formed with two grooves 18.., vThe topv of the milk chamber consists of a metal head 21 between which and the cylinder is interposed a gasket 2 2. The head is formed with a central opening around which is aflared,`depending flange 23. v24 is a nipple. for the air pipe J. 25

` is a nipple which extends through the head atv one side thereof vfor the milk-pipe'fL connect-ing the chamber withmthe teat cup cluster. In order to hold the partsV of the milk chamber together andin place on the milk can cover 12, vwe provide a pair of resilient attaching devices which are connected with Athe cover and detachabl'yen` i `the lower end of cylinder 17 and a shoulder gaged with the head21. Each of thesefdevices is preferably constructed as follows: 26 is a strap attached to the cover 12 and formed at its upper end .with an eyelet27 to receive the eyelet 28.011 a link 29 which extends through a coiled spring 30 with its upper end 31 in the form of a hook engaging the upper turn of the spring. 32 .is a clip member formed with a loop 33 engaging a recess 34 on the head 2l and formed with a shank 35 extending through spring 30 and provided at its lower end with a hook 36 engaging the lower turn of the spring. When the clip is engaged with head 21 spring 30 is under compression. Preferably a gasket 37 is interposed between 38 on the cover. This gasket formspart, preferably, of a strainer 39. By the arrangements just described the parts of the milk chamber are held in air-tight relation with each other and with the cover by defrom following` around the edge of said member intovthe air current therethrough.

In the third place, afloat valve' 41 is arranged under the air outlet, this valve being supported in a cage (Fig. 3) 4consisting pre erably of four spring legs 42, the upper ends of which are formed with bends 43 adapted to engage the member 23. The cage land ball valve may,therefore, bev readily removed when the parts of the 'milk chamber are cleaned. v.

The pump F comprises a cylinderv consistingA of a central cylinder` section 44 formed with lugs 45 adapted to be attached to the casing 46 of the ear set I-I, two end' sections 47, 47, and hea s 48, 48, these parts being held togetherby bolts 49 extending through lugs 50 on the heads. Within the y cylinder is a cross head 51 'formed'.4 with bosses 52, 52 into which are screwed the stems 53 ofa pair ofvpistons 54, 54. The latter comprise, in each case, a disc 55 formedwith a boss 56 for the outer endof i stem 53, a leather 57 and a disc 58 which" is preed against the leather bya nut 59 on the stem; Alock nut 60 is provided for the end 'of the stem engaging cross head 51.

p Connected with each' cylinder head 48 is 'a short T pipe 61 on the end of which is is attached to the branch 63-of T 61'.

We have shown an electric motor Gfor.

drivin the pump through theintermedia'- tion o the reducing gear set H. Any other suitable type of motor could be employed.

64 is a belt extending around a pulley 65 on the driven shaft of the motor and around ump cylinder sectlon 44. vGearv Wheel` nected by key pins 75 with a small gear V"the casing 46, the boss 74 extending. throughV r 4 Aan opening 1n the sideof the" 11o arranged a relief valve 62 which may be set-tol` open at any desired vacuum. Pipe J wheel 76 loose on shaft 72. Gear meshes in the motor to 40 revolutions per minute 'of shaft 72. This ratio may, of course, be-

. varied by appropriate changes the diam- `frame A, the bracket vbeing 4provided with The "motor vG is varrange etersofthel ear wheels. 2

Fixed lto t 1e end of shaft 72 rejecting into the pump cylinder is a crank 82 having 'a wrist 1n 83 which extendsrevolubly l through a gushing 84 set into' the vcross head 51.

secured to the topof cas1ng46. The casing itself is supported. one.'VA bracket 86 formed with a .leg 87 having'a notched portion88v fitting' over la cross member 89 of a pairjof-legs 90 notched'at 91 -to engage one ofthe longitudinal members 92l-of t e frame work A, on opposite sides of the cross member 89.I v `93l is a-clampin member under the frame secured y screws. 94 to t e bracket lmember 86. This arrange. ment provides a'rm vand reliable mountv ing for the pump andy its operatin mecha P nisms which permits the ready.

isassembly offthese parts when-occasion requires it. The frame .-Acomprises uprights 95, upper cross rails 96,3011 opposite sides,- one being shown, and a pair'of curved members 97 secured to theuprights 95 and adapted to extend partly around the milk cans B to keep them in place.

In order-to prevent the milk from being forced from. the milk chamber with too preferably formedwith relief ports 98 cov ered on the inside by iiap valves 99. f

Operation-Assuming' that the Amachine is usedfor milking two cows-simultaneousgreat pressure, the pistons of the pump vare theY udder attachments (not shown)l on .ends of milk vpipes L and M are put 'Y in place on the cows udders and the motor G'starte'd.` -The motor operates throu h the reducing gear set H and crank 82 an cross 4head 51 to impart reciprocating movements -at relatively slow speed -to the On the movement to the righst the pistons, the air. is exhau from 'the milk chamber D of the device on the can B, the VVfunnel-shaped closure or valve element 19 collapsing upwardly soas to close the ...,.opening through this element and to force its rim 4portion closely against the 'inner surface" of the cy-ider 17. yMilk is drawn from the oowt y ugh .pipe L and passes chamber may -cover 12 vfor cleaning. The heads 48, 48

istons 54.

is. .5) Ofi wall of thel chamber when a vacuum vis created in said chamber.

into the chamber through nipple 2 5, being deflected away from the vair outlet member 23 by the liared or conical shape of the latter member, groove 17 reventmg any milk that ma drip down t e outside of member 23 current. 'p In case the milk should rise too rom Working around into the airhigh in the receiving chamber iioat valve 41 is .lifted so as to close the air outlet. Whenthe pistons 54 arev moved zin the o osite direction, that is to say, to the left, ig. 5, milkis drawn into chamber E of the deviceA of the can C, in a similar manner,

Ithrough pipe M and the ressure reestab-v lished in milk chamber The reestabclosure element 19 torre-.assume its normal 'tion allowing the milk to be discharged into the'milk can B through strainer 39. The arrangement of the cover 12 of the -lishment of pressure in chamber D causes milk canso that a 'ventilation space 15 is provided between the cover and the top of the can allows vapors to escape and tends to cool the milk as toA minimize bacterial `pro agation. By lifting clip members. 32.t e arts lconstituting the milk quickly removed from the off'the pump cylinder aire preferably unitary with cylinder sections 47, 47, respectivcly.`; To clear the pump, the heads and cylindersections 47, 47 are removed by taking out bolts 49. The replacement of these arts can be easily made without disturbmg the leathers ofthe pistons.

leo

is' realized that While the invention hasebeen described in whatwe' regard as the preferred embodiment, modification of iconstructional details and omission of some :features considered as desirable might jbe made without departure from the principles .of the-invention. Therefore we wish it to be understood that the invention should pended claims are We claim: l .1. In combination paratus and milk conduit of a milking 'machine, a rigid milk receiving chamber provvided with an internal annular seat, and a flexible closure element removably arranged in the chamberto engage the seat and providedv with a-'milk discharge port, which element is adapted to collapse to close said port and to be pressed against the inner 2. The combination with the 'eihausting apparatus and milk conduit of a milking tmachine of a rigid milk receiving chamber with an internal annular seat, andla flexible funnel-shaped element, the rim of which removably engages the seat jin said provided with the exhausting'ap# not be considered as limited tothe partic- Y :ulary constructions, devices and vcombinationsv f shown except to the extent .that the apspecifically so limitedJ-". l

formed with anv internal circular groove,..-

- chamber formed internally, and midway of ferential chamber and which 'is flexible so that the port therethrough is closed and .the rim pressed against said wall when a vacuum is created in said chamber.

3. The combination with the exhausting apparatus and milk conduit of a milking machine, of a rigid milk receiving chamber and a flexible funnel-shaped element in sai chamber, the upper edge of which seats removably in said groove and which is adapted vto collapse under vacuum to close the port therethrough.

4.- In combination with the exhausting apparatus and milk conduit of a milking.

machine, a rigid milk receiving chamber formed with an internal circular, groove, and a flexible funnel-shaped element in said chamber, the u per edge of which seats in said groove an and' which is adapted to collapse und vacuum to close the port therethrough.

5. In combination with Athe exhausting Y apparatus and milk conduit of a milking machine, a rigid cylindrical milk receiving the length thereofwith apair of symmetrically arranged annular grooves, and a :Heir-1VJ ible funnel-shaped closure in said chamber, l

' having 'a head formed with a milk inlet and .fan inwardl -.pro]ecting flared air outlet the upper ed vof. which seats in one of said grooves, an the lower endof which. .is adapted to collapse under-vacuum vto .close the port therethrough.

6. In combination with the 1 exhausting apparatus and milk conduit of'a milking machine, a milk receptacle comprising a cylinder formed with an internal circumelement providing aport for the discharge of milk, a ortion of the element being the lower part being flat,A

oove, a head provided with milk .y and air pipes, and a exible, funnel-shaped plurality of spring devices connectedv with Y the cover 'and adapted to engage the head.

8. In a milking machine, the combination of a milk receiving chamber, a support for the same, and means for `removably holding the chamberon said support comprising a cylinder providing a milk discharge port,

and a pair of resilient engaging devices attached to said cover and adaptedto engage the head to hold the parts of the chamber together and in place on the cover. v

10. In a milking machine, a milk'chamber having a head formed with a milk inlet and 'an air outlet, a float valve adapted to close the outlet, and a cage for said float valvel provided with resilient members for detachably engaging said cage with. the head. 11. In a milking machine, a'milk chamber engaging' thev cage with said flared outlet member.

12. In a milking machine, a milk chamber having a head formed with a milk inlet and an inwardly projecting air outlet member adjacent thereto, the lower edge of which is formed with a circumferential groove, for

the purpose described.

y VJol-1m w, EsKHoLME. Y Y WILLIAM/PATTERSON.

`PoNCrUs W. JoHNsoN. 

